Chamfering plays an important role within the gear production process chain. The process occurs after the soft machining of the teeth. With chamfering, the sharp edges along the workpiece faces are eliminated and defined edge shapes can be realized. Generating a chamfer can have different reasons. For example, to avoid an embrittlement in the edge area during heat treatment or to improve assembling processes for spline gears. Furthermore, a chamfer can increase the life of the hard fi nishing tools on the following manufacturing processes. Especially honing tools can react very sensitively due to stock deviations around sharp edges.

Chamfering of internal gears

Different chamfer types for gears are possible. The shape can be parallel or variable along the tooth height. Furthermore, a chamfer can be along the full gap, including the tooth root area
or just along the tooth fl anks. The picture shows chamfer types of gears that are common nowadays.

Today chamfering takes place almost exclusively on external gears. Due to the geometry of the piece and the challenging accessibility of an internal gear, these parts can be realized only with a big manufacturing effort and only for special applications.

With the latest introduction of Samputensili’s chamfering tool for internal gears, the benefits of a chamfering tool can be used for these types of gear as well.
This new pressure-type chamfering tool has a dedicated tool profile and offers a high-production chamfering process. The tool design will be carried out specifi cally for the workpiece and in close collaboration with customers.

The tool can be mounted on different types of tool holders, thus enabling the use of the chamfering tool on different kinds of machine tools. With this new technology, Samputensili contributes to ensure the increasing demand in gear manufacturing for internal gears.

Chamfering of internal gears